Year	Percent
2002-01-01	25.60
2003-01-01	31.10
2004-01-01	27.90
2005-01-01	26.00
2006-01-01	24.70
2007-01-01	27.90
2008-01-01	21.90
2009-01-01	21.40
2010-01-01	19.90
2011-01-01	19.10
2012-01-01	19.90
2013-01-01	20.94
2014-01-01	19.96
2015-01-01	20.90